The filter presented is from 1994 but can be implemented with a more modern equivalent. We found this setting in the National Semiconductor Linear Applications Handbook.
When the AC Power line fails, the transistors in this circuit are biased to conduce the current to...
We found this 1 A switching regulator in an Electronics Now magazine from April 1993. The...
The operational amplifier used in this circuit is no longer common on the market, as the circuit is...